CA2523834A1 - Offset printing press - Google Patents
Offset printing press Download PDFInfo
- Publication number
- CA2523834A1 CA2523834A1 CA002523834A CA2523834A CA2523834A1 CA 2523834 A1 CA2523834 A1 CA 2523834A1 CA 002523834 A CA002523834 A CA 002523834A CA 2523834 A CA2523834 A CA 2523834A CA 2523834 A1 CA2523834 A1 CA 2523834A1
- Authority
- CA
- Canada
- Prior art keywords
- offset printing
- forme
- rewritable
- sleeve
- press according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000007645 offset printing Methods 0.000 title claims abstract description 90
- 238000007639 printing Methods 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000010285 flame spraying Methods 0.000 claims description 2
- 238000007751 thermal spraying Methods 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims 1
- 239000011651 chromium Substances 0.000 claims 1
- 238000013016 damping Methods 0.000 abstract description 2
- 238000007646 gravure printing Methods 0.000 description 3
- 239000002346 layers by function Substances 0.000 description 2
- 238000007644 letterpress printing Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F7/00—Rotary lithographic machines
- B41F7/02—Rotary lithographic machines for offset printing
- B41F7/04—Rotary lithographic machines for offset printing using printing units incorporating one forme cylinder, one transfer cylinder, and one impression cylinder, e.g. for printing on webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N1/00—Printing plates or foils; Materials therefor
- B41N1/04—Printing plates or foils; Materials therefor metallic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2200/00—Printing processes
- B41P2200/20—Lithography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
- B41P2227/70—Forming the printing surface directly on the form cylinder
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Printing Plates And Materials Therefor (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
- Rotary Presses (AREA)
Abstract
The invention relates to an offset printing press having at least one offset printing unit, the offset printing unit having at least one forme cylinder, one transfer cylinder, one inking unit and preferably one damping unit, and having at least one image-setting device for setting and/or erasing images on a rewritable and erasable offset printing forme which is positioned on the forme cylinder. According to the invention, for non-repeating offset printing, the rewritable and erasable offset printing forme has a seamless surface, in such a way that the total surface of the rewritable and erasable offset printing forme has a defined roughness which is adapted to offset printing.
Description
OFFSET PRINTING PRESS
FIELD OF THE INVENTION
The invention relates to an offset printing press.
BACKGROUND OF THE INVENTION
In printing processes with a fixed printing forme, a distinction is made according to the prior art between offset printing, gravure printing, letterpress printing and screen printing, flexographic printing being a special form of letterpress printing.
Each of these printing processes which are known from the prior art has its own strengths and weaknesses. Thus, gravure printing and flexographic printing are suitable for the non-repeating printing of, for example, packaging, wallpaper or wrapping paper.
However, the production of printing formes for gravure printing and flexographic printing is complicated and expensive, with the result that so far it has not been possible to realize non-repeating printing economically with a small print run. In offset printing, printing formes can be produced considerably more inexpensively, but the offset printing presses which are known from the prior art are not suitable for non-repeating printing.
In offset printing with a fixed printing forme, a distinction is made in principle between printing processes which function firstly with a printing forme which can be written once and secondly with a rewritable printing forme. Printing processes which use rewritable printing formes are also summarized under the keyword "computer to press/direct imaging". The applicant markets offset printing presses under the product designation "DICOweb" which operate using rewritable and erasable printing formes.
The principles of DICOweb technology are described in "Handbuch der Printmedien [Handbook of print media], Helmut Kipphan, pages 674 to 680, 2000, Springer-Verlag". The offset printing presses which operate using rewritable and erasable printing formes have also not previously been suitable for non-repeating offset printing.
SUMMARY OF THE INVENTION
Proceeding from this, the present invention is based on the problem of providing an offset printing press which operates using rewritable and erasable printing formes and with which non-repeating printing can be performed.
FIELD OF THE INVENTION
The invention relates to an offset printing press.
BACKGROUND OF THE INVENTION
In printing processes with a fixed printing forme, a distinction is made according to the prior art between offset printing, gravure printing, letterpress printing and screen printing, flexographic printing being a special form of letterpress printing.
Each of these printing processes which are known from the prior art has its own strengths and weaknesses. Thus, gravure printing and flexographic printing are suitable for the non-repeating printing of, for example, packaging, wallpaper or wrapping paper.
However, the production of printing formes for gravure printing and flexographic printing is complicated and expensive, with the result that so far it has not been possible to realize non-repeating printing economically with a small print run. In offset printing, printing formes can be produced considerably more inexpensively, but the offset printing presses which are known from the prior art are not suitable for non-repeating printing.
In offset printing with a fixed printing forme, a distinction is made in principle between printing processes which function firstly with a printing forme which can be written once and secondly with a rewritable printing forme. Printing processes which use rewritable printing formes are also summarized under the keyword "computer to press/direct imaging". The applicant markets offset printing presses under the product designation "DICOweb" which operate using rewritable and erasable printing formes.
The principles of DICOweb technology are described in "Handbuch der Printmedien [Handbook of print media], Helmut Kipphan, pages 674 to 680, 2000, Springer-Verlag". The offset printing presses which operate using rewritable and erasable printing formes have also not previously been suitable for non-repeating offset printing.
SUMMARY OF THE INVENTION
Proceeding from this, the present invention is based on the problem of providing an offset printing press which operates using rewritable and erasable printing formes and with which non-repeating printing can be performed.
According to the invention, for non-repeating offset printing, the or every rewritable and erasable offset printing forme has a seamless surface, in such a way that the total surface of the or every rewritable and erasable offset printing forme has a defined roughness which is adapted to offset printing.
For the first time, with the offset printing press according to the invention, an offset printing press is proposed with which non-repeating offset printing can be performed.
As a result, it becomes possible to print, for example, wallpaper, wrapping paper or else packaging by non-repeating offset printing. In the offset printing press according to the invention which operates using rewritable and erasable printing formes, printing formes which are suitable for non-repeating printing can accordingly be produced inexpensively, with the result that non-repeating printing is then also economic for small print runs.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The printing press according to the invention is an offset printing press which operates using rewritable and erasable printing formes. Offset printing presses of this type have a plurality of offset printing units, every offset printing unit having at least one forme cylinder, one transfer cylinder, one inking unit and one damping unit.
Furthermore, the offset printing units comprise at least one image-setting device, with the aid of which offset printing formes which are positioned on the respective forme cylinder can have images set and erased on them. In order to set images on the offset printing formes, image-setting material is moved in the direction of the forme cylinder and applied to the surface of the offset printing forme. Here, the image-setting material is preferably stored on a roll or a transfer ribbon and is transferred to the surface of the offset printing forme which is to have images set on it via a thermal transfer process with the aid of a laser. The image-setting material is preferably polymer material. Although the application of the image-setting material via a transfer ribbon and a laser which interacts with the transfer ribbon is preferred, it is to be noted at this point that it goes without saying that the image-setting material can also be applied to the surface of the offset printing forme which is to have images set on it via one or more inkjet nozzles.
In order then to make non-repeating offset printing possible in an offset printing press of this type which operates using rewritable and erasable offset printing formes, it is proposed in the context of the present invention to use rewritable and erasable offset printing formes with a seamless surface. Here, the seamless surface of the rewritable and erasable offset printing forme is configured in such a way that the total surface of the offset printing forme has a defined roughness or roughness depth which is adapted to offset printing. As a result, it becomes possible to set images seamlessly on the rewritable and erasable offset printing forme via the respective image-setting device.
For this purpose, image-setting material is supplied continuously to the respective image-setting device, the image-setting material preferably being applied seamlessly to the surface of the offset printing forme with the aid of a laser.
The seamless offset printing forme, the surface of which has a roughness which is adapted to offset printing, is preferably a welded sleeve made from steel, a welded seam of the sleeve being processed by a superfinishing process (in particular, grinding) in such a way that the total surface of the sleeve has a roughness which is adapted to offset printing and accordingly a surface which is suitable for offset printing is present seamlessly. The surface of the welded sleeve made from steel is preferably set to the required roughness by grinding, in particular by rough-grinding and finish-grinding. In the context of the present invention, it is possible as an alternative to configure the or every rewritable and erasable offset printing forme as a seamless, galvanically manufactured sleeve. Galvanically manufactured sleeves of this type are preferably nickel sleeves which are coated seamlessly to provide a surface which is suitable for offset printing. A sleeve of this type made from nickel is preferably coated galvanically, as has already been described, or by a PVD
coating process or by thermal spraying such as flame spraying. As a result, the surface of the seamless nickel sleeve is coated with chrome or a ceramic, in order to provide a hydrophilic functional layer on the surface of the said nickel sleeve. An image-setting material, in particular an ink-friendly polymer, can be applied to this functional layer with the aid of an image-setting device, in order to set images seamlessly on the offset printing forme which has been prepared in this way.
For the first time, non-repeating offset printing is made possible by the offset printing press according to the invention. The core concept of the invention lies in the provision of an offset printing press which operates using rewritable and erasable offset printing formes, the rewritable and erasable offset printing formes having a seamless surface and it being possible to set images on them seamlessly by means of an image-setting device. For this purpose, the seamless offset printing forme has a roughness which is adapted to offset printing in the region of its total surface.
For the first time, with the offset printing press according to the invention, an offset printing press is proposed with which non-repeating offset printing can be performed.
As a result, it becomes possible to print, for example, wallpaper, wrapping paper or else packaging by non-repeating offset printing. In the offset printing press according to the invention which operates using rewritable and erasable printing formes, printing formes which are suitable for non-repeating printing can accordingly be produced inexpensively, with the result that non-repeating printing is then also economic for small print runs.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The printing press according to the invention is an offset printing press which operates using rewritable and erasable printing formes. Offset printing presses of this type have a plurality of offset printing units, every offset printing unit having at least one forme cylinder, one transfer cylinder, one inking unit and one damping unit.
Furthermore, the offset printing units comprise at least one image-setting device, with the aid of which offset printing formes which are positioned on the respective forme cylinder can have images set and erased on them. In order to set images on the offset printing formes, image-setting material is moved in the direction of the forme cylinder and applied to the surface of the offset printing forme. Here, the image-setting material is preferably stored on a roll or a transfer ribbon and is transferred to the surface of the offset printing forme which is to have images set on it via a thermal transfer process with the aid of a laser. The image-setting material is preferably polymer material. Although the application of the image-setting material via a transfer ribbon and a laser which interacts with the transfer ribbon is preferred, it is to be noted at this point that it goes without saying that the image-setting material can also be applied to the surface of the offset printing forme which is to have images set on it via one or more inkjet nozzles.
In order then to make non-repeating offset printing possible in an offset printing press of this type which operates using rewritable and erasable offset printing formes, it is proposed in the context of the present invention to use rewritable and erasable offset printing formes with a seamless surface. Here, the seamless surface of the rewritable and erasable offset printing forme is configured in such a way that the total surface of the offset printing forme has a defined roughness or roughness depth which is adapted to offset printing. As a result, it becomes possible to set images seamlessly on the rewritable and erasable offset printing forme via the respective image-setting device.
For this purpose, image-setting material is supplied continuously to the respective image-setting device, the image-setting material preferably being applied seamlessly to the surface of the offset printing forme with the aid of a laser.
The seamless offset printing forme, the surface of which has a roughness which is adapted to offset printing, is preferably a welded sleeve made from steel, a welded seam of the sleeve being processed by a superfinishing process (in particular, grinding) in such a way that the total surface of the sleeve has a roughness which is adapted to offset printing and accordingly a surface which is suitable for offset printing is present seamlessly. The surface of the welded sleeve made from steel is preferably set to the required roughness by grinding, in particular by rough-grinding and finish-grinding. In the context of the present invention, it is possible as an alternative to configure the or every rewritable and erasable offset printing forme as a seamless, galvanically manufactured sleeve. Galvanically manufactured sleeves of this type are preferably nickel sleeves which are coated seamlessly to provide a surface which is suitable for offset printing. A sleeve of this type made from nickel is preferably coated galvanically, as has already been described, or by a PVD
coating process or by thermal spraying such as flame spraying. As a result, the surface of the seamless nickel sleeve is coated with chrome or a ceramic, in order to provide a hydrophilic functional layer on the surface of the said nickel sleeve. An image-setting material, in particular an ink-friendly polymer, can be applied to this functional layer with the aid of an image-setting device, in order to set images seamlessly on the offset printing forme which has been prepared in this way.
For the first time, non-repeating offset printing is made possible by the offset printing press according to the invention. The core concept of the invention lies in the provision of an offset printing press which operates using rewritable and erasable offset printing formes, the rewritable and erasable offset printing formes having a seamless surface and it being possible to set images on them seamlessly by means of an image-setting device. For this purpose, the seamless offset printing forme has a roughness which is adapted to offset printing in the region of its total surface.
Claims (13)
1. An offset printing press having at least one offset printing unit, the at least one printing unit having at least one forme cylinder, one transfer cylinder, and one inking unit and having at least one image-setting device for at least one of setting and erasing images on a rewritable and erasable offset printing forme which is positioned on the at least one forme cylinder, characterized in that, for non-repeating offset printing, the rewritable and erasable offset printing forme has a seamless surface, in such a way that the total surface of the rewritable and erasable offset printing forme has a defined roughness which is adapted to offset printing.
2. An offset printing press according to Claim 1, characterized in that the rewritable and erasable offset printing forme can have images set on it seamlessly by the respective image-setting device.
3. An offset printing press according to Claim 2, characterized in that, for this purpose, the image-setting device can be supplied continuously with image-setting material, it being possible to apply the image-setting material seamlessly onto the surface of the offset printing forme.
4. An offset printing press according to one or more of Claims 1 to 3, characterized in that the rewritable and erasable offset printing forme is configured as a welded sleeve, a welded seam of the respective sleeve being processed by a superfinishing process in such a way that the total surface of the sleeve has a defined roughness which is adapted to offset printing.
5. An offset printing press according to Claim 4, characterized in that the surface and the welded seam of the sleeve are set to the roughness which is adapted to offset printing by grinding, in particular by rough-grinding with subsequent finish-grinding.
6. An offset printing press according to one or more of Claims 1 to 3, characterized in that the rewritable and erasable offset printing forme is configured as a seamless and galvanically manufactured sleeve, which is coated seamlessly for the provision of a surface which is suitable for offset printing.
7. An offset printing press according to Claim 6, characterized in that the surface of the sleeve is coated seamlessly by a PVD coating process.
8. An offset printing press according to Claim 6, characterized in that the surface of the sleeve is coated seamlessly by thermal spraying.
9. An offset printing press according to Claim 6, characterized in that the surface of the sleeve is coated seamlessly by a galvanic application of chromium.
10. An offset printing press according to claim 3, characterized in that the image-setting material is applied onto the surface of the offset printing forme by a laser.
11. An offset printing press according to claim 4, characterized in that the rewritable and erasable offset printing forme is configured as a welded steel sleeve.
12. An offset printing press according to claim 6, characterized in that the rewritable and erasable offset printing forme is configured as a galvanically manufactured nickel sleeve.
13. An offset printing press according to claim 8, characterized in that the surface of the sleeve is coated by flame spraying.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004051262A DE102004051262A1 (en) | 2004-10-21 | 2004-10-21 | Offset printing machine for printing wall paper, has picturization mechanism picturizing re-recordable and erasable offset printing form that has smooth surface, where entire surface of form has defined roughness aligned to offset printing |
| DE102004051262.0 | 2004-10-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2523834A1 true CA2523834A1 (en) | 2006-04-21 |
Family
ID=36128890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002523834A Abandoned CA2523834A1 (en) | 2004-10-21 | 2005-10-19 | Offset printing press |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20060243147A1 (en) |
| JP (1) | JP2006116960A (en) |
| CN (1) | CN1762701A (en) |
| CA (1) | CA2523834A1 (en) |
| CH (1) | CH698303B1 (en) |
| DE (1) | DE102004051262A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8289352B2 (en) | 2010-07-15 | 2012-10-16 | HJ Laboratories, LLC | Providing erasable printing with nanoparticles |
| WO2017104327A1 (en) * | 2015-12-16 | 2017-06-22 | 株式会社シンク・ラボラトリー | Seamless offset cylindrical printing plate and manufacturing method therefor and reproduction processing method |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2217015A (en) * | 1936-07-16 | 1940-10-08 | Shellmar Products Co | Electrolytic process for the preparation of printing cylinders |
| JPS52105007A (en) * | 1976-02-27 | 1977-09-03 | Tokyo Kikai Seisakushiyo Kk | Endless lithographic printing press |
| US4583272A (en) * | 1982-05-13 | 1986-04-22 | Alinabal Inc. | Platens for printers |
| DE3539586A1 (en) * | 1985-11-08 | 1987-05-14 | Roland Man Druckmasch | METHOD FOR APPLYING A PROTECTIVE COATING TO A PRINTING CYLINDER WITH DEVICES FOR CARRYING OUT THE METHOD |
| DK600285D0 (en) * | 1985-12-20 | 1985-12-20 | Jens Erik Sattrup | PROCEDURE FOR MANUFACTURING A DEEP PRESSURE CYLINDER |
| DE3704695A1 (en) * | 1987-02-14 | 1988-08-25 | Basf Ag | METHOD FOR COATING FORM CYLINDERS OR FORM CYLINDER SLEEVES WITH A CONTINUOUS, SEAMLESS, LIGHT-SENSITIVE LAYER AND USE OF THE FORM CYLINDERS OR COATED IN THIS COVER. FORM CYLINDER SLEEVES FOR THE PRODUCTION OF PRINTING FORMS FOR ROTATIONAL PRINTING |
| DE58906399D1 (en) * | 1988-05-18 | 1994-01-27 | De La Rue Giori Sa | Convertible multicolour printing machine for perfecting, particularly banknotes. |
| JP3068309B2 (en) * | 1992-02-21 | 2000-07-24 | 岡本化学工業株式会社 | Method for producing aluminum support for lithographic printing plate |
| DE69308861T2 (en) * | 1992-09-10 | 1997-10-02 | Horsell Graphic Ind Ltd | PRINT PLATE AND PRODUCTION METHOD |
| US5881645A (en) * | 1992-09-10 | 1999-03-16 | Lenney; John Richard | Method of thermally spraying a lithographic substrate with a particulate material |
| US5440987A (en) * | 1994-01-21 | 1995-08-15 | Presstek, Inc. | Laser imaged seamless lithographic printing members and method of making |
| DE4430555C1 (en) * | 1994-08-27 | 1996-04-04 | Roland Man Druckmasch | Method and device for producing a printing form |
| US6779449B1 (en) * | 1994-09-15 | 2004-08-24 | Man Roland Druckmaschinen Ag | Carrying sleeve for printing and transfer forms and a process for production of such a carrying sleeve |
| DE4432814A1 (en) * | 1994-09-15 | 1996-03-28 | Roland Man Druckmasch | Carrier sleeve for printing and transfer forms |
| US5906909A (en) * | 1997-01-06 | 1999-05-25 | Presstek, Inc. | Wet lithographic printing constructions incorporating metallic inorganic layers |
| DE19807505A1 (en) * | 1998-02-21 | 1999-08-26 | Roland Man Druckmasch | Rotary sheet printer for multicolored printing |
| DE19826377A1 (en) * | 1998-06-12 | 1999-12-16 | Heidelberger Druckmasch Ag | Printing press and printing process |
| DE19850968A1 (en) * | 1998-11-05 | 2000-05-25 | Roland Man Druckmasch | Wear-resistant, ink-repellent coating, especially of press components |
| DE19939240C2 (en) * | 1999-08-18 | 2002-09-26 | Roland Man Druckmasch | Method and device for reversibly imaging a printing form |
| US7036429B2 (en) * | 1999-10-20 | 2006-05-02 | Man Roland Druckmaschinen Ag | Rubber blanket cylinder sleeve for web fed rotary printing machines |
| DE10151816B4 (en) * | 2001-10-20 | 2011-04-28 | Manroland Ag | Sleeve-shaped printing or transfer mold and apparatus for chamfering the length ends of a sleeve-shaped printing or transfer form |
-
2004
- 2004-10-21 DE DE102004051262A patent/DE102004051262A1/en not_active Withdrawn
-
2005
- 2005-10-06 CH CH01611/05A patent/CH698303B1/en not_active IP Right Cessation
- 2005-10-13 JP JP2005299148A patent/JP2006116960A/en active Pending
- 2005-10-19 CA CA002523834A patent/CA2523834A1/en not_active Abandoned
- 2005-10-20 US US11/254,306 patent/US20060243147A1/en not_active Abandoned
- 2005-10-21 CN CN200510113856.0A patent/CN1762701A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102004051262A1 (en) | 2006-04-27 |
| CH698303B1 (en) | 2009-07-15 |
| US20060243147A1 (en) | 2006-11-02 |
| JP2006116960A (en) | 2006-05-11 |
| CN1762701A (en) | 2006-04-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |